add truthy and falsey validation rules, make boolean validation rule …

…consistent in handling boolish values as truthy and falsey now do

add truthy and falsey validation rules, make boolean validation rule consistent in handling boolish values as truthy and falsey now do

src/Validation/Validation.php

@@ -522,15 +522,47 @@ public static function localizedTime($check, $type = 'datetime', $format = null)
 
     /**
      * Boolean validation, determines if value passed is a boolean integer or true/false.
+     * The list of what is considered to be boolish values, may be set via $booleanValues.
      *
      * @param string $check a valid boolean
+     * @param string $booleanValues list of valid boolish values, defaults to `[true, false, 0, 1, '0', '1']`.
      * @return bool Success
      */
-    public static function boolean($check)
+    public static function boolean($check, array $booleanValues = [])
     {
-        $booleanList = [0, 1, '0', '1', true, false];
+        $booleanValues = array_merge([true, false, 0, 1, '0', '1'], $booleanValues);
 
-        return in_array($check, $booleanList, true);
+        return in_array($check, $booleanValues, true);
+    }
+
+    /**
+     * Truthy validation, determines if value passed is truthy.
+     * The list of what is considered to be truthy values, may be set via $truthyValues.
+     *
+     * @param string $check a valid boolean
+     * @param array $truthyValues list of valid truthy values, defaults to `[true, 1, '1']`.
+     * @return bool Success
+     */
+    public static function truthy($check, array $truthyValues = [])
+    {
+        $truthyValues = array_merge([true, 1, '1'], $truthyValues);
+
+        return in_array($check, $truthyValues, true);
+    }
+
+    /**
+     * Truthy validation, determines if value passed is falsey.
+     * The list of what is considered to be truthy values, may be set via $falseyValues.
+     *
+     * @param string $check a valid boolean
+     * @param array $falseyValues list of valid falsey values, defaults to `[false, 0, '0']`.
+     * @return bool Success
+     */
+    public static function falsey($check, array $falseyValues = [])
+    {
+        $falseyValues = array_merge([false, 0, '0'], $falseyValues);
+
+        return in_array($check, $falseyValues, true);
     }
 
     /**